Add helpful comments to resulting gcode

[Fishhooks1945]

https://github.com/metalman3797/Cura-Dremel-Printer-Plugin/blob/stable/resources/definitions/Dremel3D45.def.json#L77

I'm trying to debug and learn more about G-Code

Some helpful messages in here would help the learning process and help debug issues, for example what ender 3 does:

; Ender 3 Custom Start G-code
G92 E0 ; Reset Extruder
G28 ; Home all axes
M104 S{material_standby_temperature} ; Start heating up the nozzle most of the way
M190 S{material_bed_temperature_layer_0} ; Start heating the bed, wait until target temperature reached
M109 S{material_print_temperature_layer_0} ; Finish heating the nozzle
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish